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Microchip Technology AT93C56A-10PU-2.7
- Part No.:
- AT93C56A-10PU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT93C56A-10PU-2.7.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 2MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,687
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Product details
Overview
AT93C56A-10PU-2.7 from Microchip Technology (formerly Atmel) is a 2 Kbit three-wire serial EEPROM with user-selectable 256 × 8 or 128 × 16 organization, operating from 2.7 V to 5.5 V, featuring 1 million write cycles, 100-year data retention, and 2 MHz clock rate at 5 V. It is used in industrial control systems for parameter storage and calibration data backup.
For engineers reviewing the AT93C56A-10PU-2.7 datasheet, AT93C56A-10PU-2.7 pinout, AT93C56A-10PU-2.7 application, or AT93C56A-10PU-2.7 equivalent, key selection considerations include voltage range compatibility (2.7–5.5 V), internal organization flexibility via ORG pin, self-timed write cycle (≤10 ms), standby current (6.0 µA at 2.7 V), and JEDEC PDIP-8 package footprint.
Technical Context
The AT93C56A-10PU-2.7 implements a synchronous three-wire serial interface (CS, SK, DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, and EWDS. Its operation requires Chip Select activation followed by Start Bit + Op Code + address/data sequence, with DO providing Ready/Busy status during write cycles.
Internal organization is determined by the ORG pin: tied to VCC selects 128 × 16 mode; grounded selects 256 × 8 mode; unconnected defaults to x16 via internal 1 MΩ pull-up. The device supports sequential read with automatic address increment and does not require pre-erase before write.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8 or 128 × 16 configuration) |
| Supply Voltage Range | 2.7 V to 5.5 V - enables direct integration into 3.3 V and 5 V logic systems without level-shifting |
| Write Cycle Time | ≤10 ms - defines minimum time between successive write commands; no external timing control required |
| Endurance | 1 million write cycles - supports frequent field updates in telemetry or configuration storage applications |
| Data Retention | 100 years at 25 °C - ensures long-term reliability for embedded systems with infrequent maintenance |
| Max Clock Frequency | 2 MHz at VCC = 5 V - sets maximum serial throughput of ~200 kbps for 8-bit reads |
| Standby Current | 6.0 µA at VCC = 2.7 V - critical for battery-powered devices requiring ultra-low quiescent power |
Pinout & Package
AT93C56A-10PU-2.7 is packaged in an 8-lead JEDEC PDIP (0.300" wide body, 8P3). Pin 1 is CS, pin 2 is SK, pin 3 is DI, pin 4 is DO, pin 5 is GND, pin 6 is VCC, pin 7 is ORG, and pin 8 is NC (No Connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be held low for entire instruction sequence; determines device readiness for communication |
| SK | Serial Clock | Synchronizes all data transfers; rising edge clocks DI input and DO output; frequency up to 2 MHz at 5 V |
| DI | Data Input | Receives Start Bit, Op Code, address, and write data; sampled on SK rising edge |
| DO | Data Output | Outputs read data or Ready/Busy status; high = ready, low = busy during write; tri-stated when CS is high |
| GND | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance for noise immunity |
| VCC | Power Supply | Supplies core logic and memory array; supports 2.7–5.5 V operation with specified DC/AC characteristics |
| ORG | Organization Select | Configures memory map: VCC = 128×16, GND = 256×8, floating = 128×16 (internal pull-up) |
| NC | No Connect | Unused terminal; must remain unconnected per datasheet; no internal connection or function |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 256 × 8 or 128 × 16 layout via ORG pin, enabling flexible byte/word addressing without firmware changes |
| Self-timed write cycle | Eliminates need for external write timing control or polling delay loops; DO pin provides real-time BUSY/READY feedback |
| Three-wire serial interface | Reduces PCB routing complexity vs. SPI/I²C; uses only CS, SK, and bidirectional DI/DO on shared line |
| Low-voltage operation | Guaranteed functionality down to 2.7 V allows direct use in 3.3 V systems without regulators or level shifters |
| High endurance and retention | 1M write cycles and 100-year data retention meet industrial equipment lifecycle requirements without wear leveling |
Applications
| Industrial Sensor Calibration | Consumer Appliance Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and user-adjusted trim values in temperature/humidity sensors. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with infrequent writes and frequent reads; accessed during power-up and calibration routines. Use Value: Enables field-replaceable sensor modules with persistent calibration data across power cycles and firmware updates. | Use Scenario: Saving user preferences (e.g., cooking time, temperature presets, language) in microwave ovens and washing machines. IC Role / Device Role / Timing Role: Low-power configuration memory updated only when settings change; retains data during AC power loss. Use Value: Eliminates need for backup batteries or supercapacitors while supporting >100,000 setting changes over product lifetime. |
| Medical Device Settings Backup | Automotive Body Control Module |
Use Scenario: Preserving alarm thresholds, dosage limits, and operator IDs in portable infusion pumps and blood glucose meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for safety-critical parameters; write-protected after initialization via EWDS instruction. Use Value: Meets IEC 62304 Class B software requirements for persistent data integrity without external security ICs. | Use Scenario: Storing door lock/unlock patterns, mirror position memory, and lighting profiles in automotive BCMs. IC Role / Device Role / Timing Role: EEPROM accessed via microcontroller's GPIO bit-banged interface; withstands automotive temperature range (−40 °C to +85 °C). Use Value: Provides cost-effective, AEC-Q100-compatible nonvolatile storage without requiring CAN or LIN bus integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-WMN6TP | 256 Kbit SPI interface, 5 V tolerant, 20 MHz max clock, 40 µA standby current at 5 V | Higher density and faster interface but requires SPI controller support and higher supply current | Select when system already uses SPI peripherals and needs >2 Kbit capacity |
| 25AA020A-I/P | 2 Kbit SPI EEPROM, 1.8–5.5 V, 5 MHz max clock, 1 µA standby at 1.8 V, SOIC-8 package | Lower standby current and wider voltage range, but lacks ORG pin flexibility and uses SPI instead of three-wire | Select for ultra-low-power battery applications where pin count permits SPI interface |
Compared with M95256-WMN6TP and 25AA020A-I/P, AT93C56A-10PU-2.7 offers unique hardware-selectable organization and minimal pin count (3-wire), making it optimal for space-constrained designs where SPI is unavailable or unused, despite lower density and slower clock than alternatives.
Availability
AT93C56A-10PU-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance configuration, medical device settings backup, and automotive body control module applications requiring stable component supply and long-term obsolescence management.
Supply support for AT93C56A-10PU-2.7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a global semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions, with a focus on embedded control and connectivity.
The AT93C56A-10PU-2.7 belongs to Microchip's legacy serial EEPROM product line, designed for cost-sensitive, low-pin-count applications requiring reliable parameter storage in industrial, medical, and consumer electronics.
FAQ
What is the correct supply voltage range for AT93C56A-10PU-2.7?
The AT93C56A-10PU-2.7 operates from 2.7 V to 5.5 V. This is explicitly defined in its ordering code suffix "-2.7" and confirmed in Table 3-2 of the datasheet under VCC2 parameter. Operation below 2.7 V is not guaranteed, and absolute maximum rating is 6.25 V. The device is not rated for 1.8 V operation - that variant is designated AT93C56A-10PU-1.8.
How does the ORG pin affect memory organization in AT93C56A-10PU-2.7?
The ORG pin on AT93C56A-10PU-2.7 selects between two memory maps: when tied to VCC, it configures 128 words × 16 bits; when grounded, it configures 256 words × 8 bits. If left unconnected, the internal 1 MΩ pull-up defaults to x16 mode. This hardware-selectable organization eliminates firmware dependency for byte vs. word access patterns.
Does AT93C56A-10PU-2.7 support sequential read operations?
Yes, AT93C56A-10PU-2.7 supports sequential read: after initiating a READ instruction, holding CS low causes the internal address pointer to auto-increment, allowing continuous clocking of successive memory locations on DO without reissuing the instruction. No dummy bit is inserted between words, enabling efficient bulk data retrieval.
What is the maximum clock frequency supported by AT93C56A-10PU-2.7?
The maximum clock frequency for AT93C56A-10PU-2.7 is 2 MHz, specified at VCC = 4.5 V to 5.5 V. At 2.7 V to 4.5 V, the maximum is 1 MHz; at 1.8 V to 2.7 V, it drops to 0.25 MHz. These values are defined in Table 3-3 (AC Characteristics) and depend strictly on applied VCC - not a fixed upper limit across all voltages.
Is AT93C56A-10PU-2.7 still recommended for new designs?
No, AT93C56A-10PU-2.7 is not recommended for new designs. According to the datasheet revision history (3378O, July 2012), it has been superseded by the AT93C56B series. However, AT93C56A-10PU-2.7 remains actively manufactured and supported for legacy program continuity, with full documentation and second-source availability through authorized distributors.
AT93C56A-10PU-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8, 128 x 16
- Memory Interface:
- 3-Wire Serial
- Clock Frequency:
- 2 MHz
- Write Cycle Time - Word, Page:
- 10ms
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT93C56A-10PU-2.7 FAQ
1.How can I place an order for AT93C56A-10PU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56A-10PU-2.7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT93C56A-10PU-2.7 reliable?
The price and inventory of AT93C56A-10PU-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C56A-10PU-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C56A-10PU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56A-10PU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56A-10PU-2.7?
AT93C56A-10PU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56A-10PU-2.7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT93C56A-10PU-2.7?
For technical support, including AT93C56A-10PU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56A-10PU-2.7 requirements.
6.How does Aetrix verify that AT93C56A-10PU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C56A-10PU-2.7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT93C56A-10PU-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C56A-10PU-2.7?
All AT93C56A-10PU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56A-10PU-2.7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT93C56A-10PU-2.7 part is unused and in its original packaging.
Return procedure for AT93C56A-10PU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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